An improved method of preparing acid addition salts of dl 6-phenyl-2,3,5,6-tetrahydroimidazo[2,1-b]thiazole (dl-tetramisole) by reacting dl-3-(.beta.-hydroxyphenethyl)-2-iminothiazolidine or an acid-addition salt thereof, with a mixture of concentrated hydrochloric acid and concentrated sulfuric acid to obtain dl 3-(.beta.-chlorophenethyl)-2-iminothiazolidine acid-addition salt, treating this compound with aqueous alkali to obtain dl 6-phenyl-2,3,5,6-tetrahydroimidazo[2,1-b]thiazole free base, and converting the latter compound to dl 6-phenyl-2,3,5,6-tetrahydroimidazo [2,1-b]thiazole acid-addition salts in a highly purified state. The products are useful as anthelmintics.
一种改进的制备dl 6-苯基-2,3,5,6-四氢
咪唑[2,1-b]
噻唑醇(dl-四氢
咪唑)酸盐的方法包括将dl-3-(β-羟基苯乙基)-2-亚
硫代
噻唑烷或其酸盐与浓
盐酸和浓
硫酸混合物反应,得到dl 3-(β-
氯苯乙基)-2-亚
硫代
噻唑烷酸盐,将该化合物与
水碱处理以获得dl 6-苯基-2,3,5,6-四氢
咪唑[2,1-b]
噻唑醇游离碱,然后将后者转化为高度纯化的dl 6-苯基-2,3,5,6-四氢
咪唑[2,1-b]
噻唑醇酸盐。这些产品可用作驱虫药。